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<div class="titlepage"><div><div>
<h2 class="title">
<a id="release-notes-7.5.1"></a>Elasticsearch version 7.5.1<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/docs/reference/release-notes/7.5.asciidoc">edit</a>
</h2>
</div></div></div>
<p>Also see <a class="xref" href="breaking-changes-7.5.html" title="Breaking changes in 7.5">Breaking changes in 7.5</a>.</p>
<h3>
<a id="enhancement-7.5.1"></a>Enhancements<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/docs/reference/release-notes/7.5.asciidoc">edit</a>
</h3>
<div class="variablelist">
<dl class="variablelist">
<dt>
<span class="term">
Features/Watcher
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Log attachment generation failures <a href="https://github.com/elastic/elasticsearch/pull/50080" class="ulink" target="_top">#50080</a>
</li>
</ul>
</div>
</dd>
<dt>
<span class="term">
Network
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Netty4: switch to composite cumulator <a href="https://github.com/elastic/elasticsearch/pull/49478" class="ulink" target="_top">#49478</a>
</li>
</ul>
</div>
</dd>
</dl>
</div>
<h3>
<a id="bug-7.5.1"></a>Bug fixes<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/docs/reference/release-notes/7.5.asciidoc">edit</a>
</h3>
<div class="variablelist">
<dl class="variablelist">
<dt>
<span class="term">
Authentication
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Fix iterate-from-1 bug in smart realm order <a href="https://github.com/elastic/elasticsearch/pull/49473" class="ulink" target="_top">#49473</a>
</li>
</ul>
</div>
</dd>
<dt>
<span class="term">
CRUD
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Do not mutate request on scripted upsert <a href="https://github.com/elastic/elasticsearch/pull/49578" class="ulink" target="_top">#49578</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/48670" class="ulink" target="_top">#48670</a>)
</li>
</ul>
</div>
</dd>
<dt>
<span class="term">
Cluster Coordination
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Make elasticsearch-node tools custom metadata-aware <a href="https://github.com/elastic/elasticsearch/pull/48390" class="ulink" target="_top">#48390</a>
</li>
</ul>
</div>
</dd>
<dt>
<span class="term">
Engine
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Account trimAboveSeqNo in committed translog generation <a href="https://github.com/elastic/elasticsearch/pull/50205" class="ulink" target="_top">#50205</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/49970" class="ulink" target="_top">#49970</a>)
</li>
</ul>
</div>
</dd>
<dt>
<span class="term">
Features/ILM+SLM
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Handle failure to retrieve ILM policy step better <a href="https://github.com/elastic/elasticsearch/pull/49193" class="ulink" target="_top">#49193</a> (issue: <a href="https://github.com/elastic/elasticsearch/pull/49128" class="ulink" target="_top">#49128</a>)
</li>
</ul>
</div>
</dd>
<dt>
<span class="term">
Features/Java High Level REST Client
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Support es7 node http publish_address format <a href="https://github.com/elastic/elasticsearch/pull/49279" class="ulink" target="_top">#49279</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/48950" class="ulink" target="_top">#48950</a>)
</li>
</ul>
</div>
</dd>
<dt>
<span class="term">
Geo
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Fix handling of circles in legacy geo_shape queries <a href="https://github.com/elastic/elasticsearch/pull/49410" class="ulink" target="_top">#49410</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/49296" class="ulink" target="_top">#49296</a>)
</li>
</ul>
</div>
</dd>
<dt>
<span class="term">
Infra/Packaging
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Extend systemd timeout during startup <a href="https://github.com/elastic/elasticsearch/pull/49784" class="ulink" target="_top">#49784</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/49593" class="ulink" target="_top">#49593</a>)
</li>
</ul>
</div>
</dd>
<dt>
<span class="term">
Machine Learning
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Use query in cardinality check <a href="https://github.com/elastic/elasticsearch/pull/49939" class="ulink" target="_top">#49939</a>
</li>
<li class="listitem">
Fix expired job results deletion audit message <a href="https://github.com/elastic/elasticsearch/pull/49560" class="ulink" target="_top">#49560</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/49549" class="ulink" target="_top">#49549</a>)
</li>
<li class="listitem">
Apply source query on data frame analytics memory estimation <a href="https://github.com/elastic/elasticsearch/pull/49527" class="ulink" target="_top">#49527</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/49454" class="ulink" target="_top">#49454</a>)
</li>
<li class="listitem">
Stop timing stats failure propagation <a href="https://github.com/elastic/elasticsearch/pull/49495" class="ulink" target="_top">#49495</a>
</li>
</ul>
</div>
</dd>
<dt>
<span class="term">
Mapping
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Improve DateFieldMapper <code class="literal">ignore_malformed</code> handling <a href="https://github.com/elastic/elasticsearch/pull/50090" class="ulink" target="_top">#50090</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/50081" class="ulink" target="_top">#50081</a>)
</li>
</ul>
</div>
</dd>
<dt>
<span class="term">
Recovery
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Migrate peer recovery from translog to retention lease <a href="https://github.com/elastic/elasticsearch/pull/49448" class="ulink" target="_top">#49448</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/45136" class="ulink" target="_top">#45136</a>)
</li>
</ul>
</div>
</dd>
<dt>
<span class="term">
SQL
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
COUNT DISTINCT returns 0 instead of NULL for no matching docs <a href="https://github.com/elastic/elasticsearch/pull/50037" class="ulink" target="_top">#50037</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/50013" class="ulink" target="_top">#50013</a>)
</li>
<li class="listitem">
Fix LOCATE function optional parameter handling  <a href="https://github.com/elastic/elasticsearch/pull/49666" class="ulink" target="_top">#49666</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/49557" class="ulink" target="_top">#49557</a>)
</li>
<li class="listitem">
Fix NULL handling for FLOOR and CEIL functions <a href="https://github.com/elastic/elasticsearch/pull/49644" class="ulink" target="_top">#49644</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/49556" class="ulink" target="_top">#49556</a>)
</li>
<li class="listitem">
Handle NULL arithmetic operations with INTERVALs <a href="https://github.com/elastic/elasticsearch/pull/49633" class="ulink" target="_top">#49633</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/49297" class="ulink" target="_top">#49297</a>)
</li>
<li class="listitem">
Fix issue with GROUP BY YEAR() <a href="https://github.com/elastic/elasticsearch/pull/49559" class="ulink" target="_top">#49559</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/49386" class="ulink" target="_top">#49386</a>)
</li>
<li class="listitem">
Fix issue with CASE/IIF pre-calculating results <a href="https://github.com/elastic/elasticsearch/pull/49553" class="ulink" target="_top">#49553</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/49388" class="ulink" target="_top">#49388</a>)
</li>
<li class="listitem">
Fix issue with folding of CASE/IIF <a href="https://github.com/elastic/elasticsearch/pull/49449" class="ulink" target="_top">#49449</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/49387" class="ulink" target="_top">#49387</a>)
</li>
<li class="listitem">
Fix issues with WEEK/ISO_WEEK/DATEDIFF <a href="https://github.com/elastic/elasticsearch/pull/49405" class="ulink" target="_top">#49405</a> (issues: <a href="https://github.com/elastic/elasticsearch/issues/48209" class="ulink" target="_top">#48209</a>, <a href="https://github.com/elastic/elasticsearch/issues/49376" class="ulink" target="_top">#49376</a>)
</li>
</ul>
</div>
</dd>
<dt>
<span class="term">
Snapshot/Restore
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Fix Index Deletion during Snapshot Finalization <a href="https://github.com/elastic/elasticsearch/pull/50202" class="ulink" target="_top">#50202</a> (issues: <a href="https://github.com/elastic/elasticsearch/issues/45689" class="ulink" target="_top">#45689</a>, <a href="https://github.com/elastic/elasticsearch/issues/50200" class="ulink" target="_top">#50200</a>)
</li>
</ul>
</div>
</dd>
<dt>
<span class="term">
Transform
</span>
</dt>
<dd>
<div class="ulist itemizedlist">
<ul class="itemizedlist">
<li class="listitem">
Fix possible audit logging disappearance after rolling upgrade <a href="https://github.com/elastic/elasticsearch/pull/49731" class="ulink" target="_top">#49731</a> (issue: <a href="https://github.com/elastic/elasticsearch/issues/49730" class="ulink" target="_top">#49730</a>)
</li>
</ul>
</div>
</dd>
</dl>
</div>
</div>
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